linux-imx

/*

 * This file is subject to the terms and conditions of the GNU General Public

 * License.  See the file "COPYING" in the main directory of this archive

 * for more details.

 *

 * Copyright (C) 2016, 2017 Cavium Inc.

 */

​

#include <linux/bitops.h>

#include <linux/gpio/driver.h>

#include <linux/interrupt.h>

#include <linux/io.h>

#include <linux/irq.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/pci.h>

#include <linux/spinlock.h>

​

​

#define GPIO_RX_DAT 0x0

#define GPIO_TX_SET 0x8

#define GPIO_TX_CLR 0x10

#define GPIO_CONST  0x90

#define  GPIO_CONST_GPIOS_MASK 0xff

#define GPIO_BIT_CFG    0x400

#define  GPIO_BIT_CFG_TX_OE     BIT(0)

#define  GPIO_BIT_CFG_PIN_XOR       BIT(1)

#define  GPIO_BIT_CFG_INT_EN        BIT(2)

#define  GPIO_BIT_CFG_INT_TYPE      BIT(3)

#define  GPIO_BIT_CFG_FIL_MASK      GENMASK(11, 4)

#define  GPIO_BIT_CFG_FIL_CNT_SHIFT 4

#define  GPIO_BIT_CFG_FIL_SEL_SHIFT 8

#define  GPIO_BIT_CFG_TX_OD     BIT(12)

#define  GPIO_BIT_CFG_PIN_SEL_MASK  GENMASK(25, 16)

#define GPIO_INTR   0x800

#define  GPIO_INTR_INTR         BIT(0)

#define  GPIO_INTR_INTR_W1S     BIT(1)

#define  GPIO_INTR_ENA_W1C      BIT(2)

#define  GPIO_INTR_ENA_W1S      BIT(3)

#define GPIO_2ND_BANK   0x1400

​

#define GLITCH_FILTER_400NS ((4u << GPIO_BIT_CFG_FIL_SEL_SHIFT) | \

                 (9u << GPIO_BIT_CFG_FIL_CNT_SHIFT))

​

struct thunderx_gpio;

​

struct thunderx_line {

    struct thunderx_gpio    *txgpio;

    unsigned int        line;

    unsigned int        fil_bits;

};

​

struct thunderx_gpio {

    struct gpio_chip    chip;

    u8 __iomem      *register_base;

    struct irq_domain   *irqd;

    struct msix_entry   *msix_entries;  /* per line MSI-X */

    struct thunderx_line    *line_entries;  /* per line irq info */

    raw_spinlock_t      lock;

    unsigned long       invert_mask[2];

    unsigned long       od_mask[2];

    int         base_msi;

};